Juniper MX2010, Hardware Manual

Page: 327 / 825

a. Attach the positive (+) DC source power cable lug to the RTN (return) terminal.
b. Attach the negative (–) DC source power cable lug to the –48V (input) terminal.
Figure 133: Connecting Power Cables to the DC Power Distribution Module (-48 V)
D
g007053
Terminal
studs
Cable
lug
Nut
Split
washer
Grounding points
(on chassis)
Flat
washer
CAUTION: Ensure that each power cable lug seats flush against the surface of
the terminal block as you are tightening the nuts. Ensure that each nut is properly
threaded onto the terminal stud. The nut should be able to spin freely with your
fingers when it is first placed onto the terminal stud. Applying installation torque
to the nut when the nut is improperly threaded may result in damage to the
terminal stud.
CAUTION: The maximum torque rating of the terminal studs on the DC PDM
is 25 lb-in. (33.89 Nm). The terminal studs may be damaged if excessive torque
is applied. Use only a torque-controlled driver or socket wrench to tighten nuts
on the DC PDM terminal studs.
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